Gas-reversing valve.



No. 661,670. Patented Nov. i3, |900.

H. E. SCHILD.

GAS REVERSING VALVE.

(Application led Apr. 4, 1900.)

(Nn Model.)

' orhgp:

I o nfior regenerating-furnaces of the Siemens open- UNITED STATES PATENT OFFICE.

HERMANN E. SCHILD, oFPITTsnURG, PENNSYLVANIA.

- ons-lauavERslNel VALVE.

PEGIFICATION forming part of Letters Patent No. 661,670, dated November 13, 1900 Application filed April 4,' '1900.

To all whom it' may concern: Y

VBe it known that I; HERMANN E. SCHILD, a

1- resident of Pittsburg, infthe county of Allegheny and State of Pennsylvania, ,have in- 5 v.vented a new and useful Improvementin Gas- Reversing` Valves; and I do hereby declare .the following to be a full, clear, and exact de` scription thereof..

.My -in vent-ion relatesto gas-reversing valves 4hearth and reheating types; and its object is 'to provvide'a gas-reversing valve which 'will prevent thetwaste of gas due )to leakage Aof the valve, and especially that whichr occurs 1.5 during the reversing operation; I f

` As is well-known, regenerating f furnaces are' provided with four-regenerators or heat- 4ing-chambers for .the air and gas, .two being Aprovided 'for `th'ejair"and two for the4 gas;

zogEach'` 'of these: chambers is filled with lfire- 'brick or other refractory materialek'nown las checker-work@ whehnpon becomingheat' Vel serves as the means' for .heating the 'air or gaspas'singfthr'ough .the same. The air and asgas areeacheconiiucted through a regenerator,

' where theypecome'heate, and thence to the combustion-chamber,- the 'waste prod nets-of 'combustion passinglhrough the two. remaing yning. 'rege'nerators.heating` the checker-workA Ao inthe .'same, .thereby themselves becoming cooled, 'and' .thence yout at the chimney-line. The 'first seti of 1 regeneratorsgradually cool oil?, andY after ac'ertain time it becomes neces; sary tofreverse; the course of the air and 'gas through tle furnace, the 4same then passing throughthe Anewly-licated. regenerators, in to.

'the combustion-chamber and the waste products ofcombustion passing through the re` generators'tirst used,rehe ating the same, .and 4o thence out through'the chimney-flue; The cours'e of the air and vgas through the furnace has `heretofore 4been reversed by means ofor dinary-butterl1yvalves,'which resemble van ordinary damper placed in thefair and gas lj-fluest 'Suchvalves'arel fairlyeiective for the air-dues, but are open to serions-objec tions in the gas-dues. Owing to the inten-se heat to which they are subjected they soon; become warped yand burned, so that they nofv5o longer tclosely upon the'seatsprovided for y them, allowing a considerable amount of gas to continually escape into thechimney-due,

derni No. 11.483.- ma man.,

thereby unnecessarily wasting the same. Furthermore, in reversingthe valveV there is a short interval during which the gas-inletis opened directly to the chimney-line, allowing a further waste. At the same time 'the gas comes in' contact and mixes'with the waste prod ncts of combustion, and if the gas is not ,pure more or less serious explosions are liable to occur. To overcome the leakage caused by the warping and burning of the butterflyvalve, it has been proposed to' use a domeshaped valve tting over refractory projections on the base,over which 'said valve had to be lifted in the reversing operation. This overcomes the'defect aimed at but is still open to the objectionofopening'the gas-inlet v directly to the-chimney-iiue during the reversing operation, therby .wasting gas, and is also open to-theobjection that it is entirely inclosed in a chamber, so that-it cannot be readily inspected to detect defects therein. Various otherforms of valves have been used, but allure open to the same objections as the dome-shaped valye.

The object of, my invention is to overcome these defects and, provide a valvexwhich will not become warped'or burned and 'allow leak- `age ot gasto the chimney-due, which'will not duringpthe reversing operation openthe gas- .inlet directly to the chimney-due, and which 4may be inspected at any time. and defects therein corrected.

To this endt'consists of a gas-reversing `It -further consists-of .a slide-valve ot' this character, in which thereis4 little liability of to elect 'a close 'seatiugof the valvehupon the face-plate surrounding the ports leading to the regenerator'l and chimney-due, respectively. Y

It further consists 4in certain details of con;

struction whereby tine valve or its parts are. readily removablel for the purpose of repairv Ving the same or substituting-new .parts in place thereof,

-To enable others skilled in the art to which Ahas allv its parts exposed, so that the same `its burning Loutand which embodiessmeans my invention relates tomake and use the' same, I will now describe it more fully, re-

, in that relation for the reason that it isof no` ferring to the accompanying drawings, in which.

Figure 1 is a vertical longitudinal section of my reversing-valve with the necessary adjacent parts; and Fig. 2 is a transverse vertical section of the same on the line 2 2, Fig. 1.

The reference-numeral 1 indicates the iue leading to the chimney,A while l2 and 3 represent the ues leading to two of the `regenerators, it beingl understood that only one set of regenerators and the reversing-valve therefor are involved in this application. It is obvious that. a valve similar to that shown may be used for the regenerators for heating the air, although I havenot found it necessary, the ordinary butterfly-valve being etfective consequence whether or not air escapes into the -chimney-fiuefr- The filles 1,2, and 3 are located in ordinary masonry,-asdisclosed, on the top of which is placed the plate 4, having suitable openings registering-with the flues and cored out, as shown at 5 5, to allow for the circulation of water to cool the same.

'lhe gas comes from the gas generator through thel pipe l5 into the gas-box 7, the latter being a rectangular box provided with a flanged opening 8 in its bottom, upon which rests the gas-regulating valve 9, controlledA by means ofthe stem 10, passing through the top of said chamber, as will be readily understood by those versed in this art.

vUpon each side of the plate 4 are rails 1l,

upon which moves a carriage provided vwith ordinary wheels 12 and. side beams 13, the rel maining 'details of construction ot' the carf riage being immaterial and may be of any vertically toprovide forthe proper seatingL of the same upon the plate 4. Said member 15 on its lower face is provided with the recesses 19 for receiving asbestos or other suitable packing to insure a close itot' the same on the plate 4. The'member 15 has an opening 20 in its top, surrounding which is a pan 21, said pan being suitably secured to the member 15 in such manner that it may be readily removed therefrom-asor instance, by having suitable projections fitting into corresponding Y recesses. The pan 21'hasits periphery turned upward to form the flanges 22, and about the central opening in the same'is a similar upwardly-,projecting annular flange 23. The

lower edges 24 of the side walls of the gas-box 7 project downlinto the pan in close proxim- 'out at lthe `chimney-flue.

ity to the bottom of the latter, and when water or a similar liquid is placed in said'pan au etT'ective seal'is provided which will prevent gas from escaping into the atmosphere. The pan 21 is made of suitable length to allow the valve to vbe moved on the track 11 to bring it into either of its operative positions. Located within the arch of the member 1.5 is the member 1G, which is suspended from the member 15 by means of the rods 15 l5, passing through laterally-projecting lugs on the two members and provided with suitable nuts 25 for adjusting the member 1li vertically with reference to themember. 15. 'lhe member 16 consists of an arch-shaped metallic shell 26, lined with lire-brick or other snitable refractory material 27, as clearly indicated, and bridged by a plate 2S, `covered with similar refractory material 29. It will be observed .that the side beams 13 of the carriage are placed at such a height that the lower edge thereof is above the top of the member 16,and as the member 15 is opened at both sides the member 16 can be'remov'ed byinerely sliding it out sidewise under the. beams 13 of the carriage. lt. will be further observed that the lower face of the member 16 is not provided with packing, it not being necessary to have an absolutely tight joint for the reason that the outside of said member is in direct contact with the air and no harm will result il air should leak in, as' it would'merely pass By providing an open space between the members 15 and 16 a free circulation of air is permitted, thereby keeping the memberlcooh ,c The valve maybe reversed by any suitable mechanism-as, for instance, by means ofthe lever 30, pivoted in any -suitable manner and connected to the carriage by the link 31; but it is obvious that other mechanism may be used-such, for instance, as a hydraulic cylinder. To each endof the rails 11 are re` movably secured, as by means of bolt.s,.-inV

clined blocks 32, whichserve as stops to limit the movement of the valve in either direction", but at the same time allow of its ready .removal byvmerely unbolting said blocks. '4

In the position of the valve shown the gas coming from the generator passes through the pipe 6 into the gas-box 7, thence through the opening 8 in the bottom thereof, the amount depending upon the position of the valve 9, thence through the opening 20 in the top of the member 15, through the passage in the latter to the flue 3, leading 'to one of theregenerators, where it becomesheated. 'lhence passing to the furnace-chamber it mixes with the air coming from another regenerator, the waste products of combustion passing through the othertwo regenerators and return thro ugh the line 2, and thence through the passage in the memberl into the chimney-flue 1. yWhen the valve is reversed or moved to the left in Fig. l, the course lof the gas and waste prodvucts of combustion is just the reverse of that Vdescribedmthat is to say, from the gas-box IIO IZO

eser avais-ins serv through the passage in the member into the ue'2 to the newly-heated regenerator, where it becomes heated, thence to the comf bnstion-chamber, as before, the waste prodbefore.

g The arrangement of the passages in the members 15 and 16, respectively, is such that at no time in reversing the valve is the gasboX open to the chimney-due 1, preventing all loss of gas in the reversing of the valve. The member 15, furthermore, is not in contact with any part that receives the heat froml the waste products of combustion, for the reason that the latter pass through the member.

16, the air-gap betweenthe member 16 and the member l5 keeping the latter perfectly cool. It is therefore possible at all times to have the member 15 seated closely upon the base-plate 4, thereby obviating any loss of gas from imperfectjoints in these parts. A

Themember 16 may be readily removed by merely removing the rodsl 152L 15:", when the said member can be slid ont'sidewise underneath the beams 13 ot' the carriage. In order to remove the .carriage and all the parts of the valve, it is merely necessary to unbolt the stop-blocks 32 at 4one end of the traclr` and raise the pan 21 from the top of member 15, when the carriage and all the valve parts can bemoved out from under the same. i

It is obvious that the members 15 and 16 might be formed integral, or at least theppas-` sages in the same might be cored out inra single integral cast block. This would pro-l derstood that I consider it within the scope' of my invention to use a single integral valve provided with two passages having the same relation to each .other as the passages in the members l5 and 16.

Having described my invention, what I` f claim as new, and desire `to cover by Letters Patent, is

1. In a gas-reversing valve,the combination with the gas-box and chimney and regenerator-ues, of a reversing-valve comprising twomembers constructed and designed to op` crate together, each of said members being provided with apassage, and an air-space between said members, said members being so arranged that as the valve is reversed one of said passages connects the gas box alternately with the regenerator-ues while the other passage connects the chimney-due alternately with the regenerator-iiues but in the reverse orderin which the same are connected with the gas-box.

2. In a gas-reversing valve, the combination with a gas-box and chimney and regenerator-tlnes, of a reversing-valve comprising two independent members, each of which is provided with a passage, and means for connccting said members out of contact with each other, said members being so arranged that as the valve is reversed one of said passages connects tne gas-boxv alternately with the regenerator-iu es while the other passage connects the chimney-flue alternately with' the regenerator-flues butin the reverse order in which the same are connected with the gas-box.

3. In a gas-reversing valve, the combina' tion with a gas-box and chimney and regenerator-tlues, of a reversing-valve comprising two independent members, each of which is provided with a passage, and means for connecting said members out of contact with each other, said means permittingsaid members to be adj usted relatively to each other, said members being'so arranged that as the valve is reversed one of said` passages connects the gas-box alternately with the regenerator-ues whilefthe other passage connects the chimney-ilue'alternately with the regenerator-tlues but in the reverse order in whichv the sameare connected with the gas-box.

4. In agate-reversing valve, the combina tion with the gas-box and chimney and regenerator-ues, of a slide-valve intermediate said gasbox and fines, and a Water seal betweensaid slide-valve and the gas-box. -5. In a gasreversing valve, the combination with the gas-box and chimney and regenerator-liues, of a slide valve intermediate said gas-box and dues, and a pau removably placed on the top ot the valve and adapted to receive water to form a seal between said TCO IIO

carriage and secure it in any of its adjusted positions. t d n 7. In a gas-reversing valve, the combination "with the track, of the carriage moving thereon, a slide-valve mounted on the carria-ge, and removable stops secured to the track.

8. In a gas-reversing valve, the combination with the track, of the carriage moving thereon, removable stops secured to the track, a slide-valve mounted on the carriage, and a pan removably placed on the top ofthe valve.

9. In a gas-reversing Valve, the combinationwith a carriage having side beams, of the slide-valve comprising two separate members removably mounted on said carriage, one of said members having its top normally lying below the lower edge of the side'beams of the carriage.

10. A gas-reversing valve comprising the arched member and the member located within the arch of the first-named member but ont of contact therewith, and means for connecti memberlocated in the arch of the first-named ing said members to cause them to move to- 11. In a gas-reversing valve, thefcombina-` member mounted thereon, and'y the sliding member but out of contact therewith.

12. In a gas-reversing valve, the combina-A the arched sliding member mounted thereon,

andr the sliding member 'located' in the arch ber located in the archof the first-named. memy of the rstnamed member with its top below the lower edge ofthe side beams of the carrage. i

13. In a gas-reversing valve, the combi-nation with the carriage, of the arched sliding member mounted thereon, the sliding memthe pan removably placed on the top thereof,

and the slidingmember located in the arch' of the first-named member with its top below the lower edge of the side beaune of the carriage. e

` 15. In .a gas-reversing valve, the combination with the Igas-box and chimney and regenerator-'ines, of the-arched sliding memberv havinganopening in its top communicating wi th the gas-box and an opening in each lower end adapted to register alternately with the regenerator-nes, anda second sliding member and ont of contact therewith, and having a passage registering with the chimney-Hue and alternately with the regenerator-fiues.

.16. In a gas-reversing valve, tqhe combination with a gas-box and chimney andl regenerator-uesnof the arched sliding member intermediate said gasjbox and iiues and having an opening in its top communicating with the gasbox and an opening in each lower end adapted to register alternately with the regenerator-lues, a pan removably placed on the top thereof and adapted to receive Water to form a seal between said slide-valve and gasboX, anda second sliding member located in the arch of the first-named member and hav` ing a passage registering with the chimney- -fine and alternately with the regeneratordues'.

17. In a gas-reversing valve, the combination with the gas-box and chimney and regen?V erator-.uespf thecarriage having side beams;

the arched sliding member mounted thereon .and having an opening in the top c0mmunieating with the gas-box and an opening in each lower end adapted to register alternatelyWi-th member and located inthe arch thereof Awith its top below the side beams of the carriage and having a passage registering with the chimney-fine and alternately with the regenerator-llues.

HERMANN E. SCHILD. Witnesses:

HARRY G. WISEMAN, y ROBERT C. ToT'rEN. 

